Scientists capture viruses building themselves in real time

Researchers at Oxford used mass photometry and single-molecule trapping to watch virus-like particles assemble piece by piece in real time. They discovered the process starts with weak, reversible interactions where protein building blocks collide and form temporary bonds. When five larger protein units form a pentagonal ring, a stable structure emerges that guides the assembly forward, making the process both reliable and efficient.

Most encounters don't have to be successful. The components can separate and try again. But once enough of them come together in the right closed arrangement, the structure becomes stable, and assembly can move forward.